Quoted:
My LMT 16" carbine with LMT SA BCG and Car buffer is extracting so that the casings hit the deflector of the upper. Im trying to get the extraction be more positive but got no difference in result when switching to a FA BCG and H2 buffer.

Any ideas?

Quoted:
My LMT 16" carbine with LMT SA BCG and Car buffer is extracting so that the casings hit the deflector of the upper. Im trying to get the extraction be more positive but got no difference in result when switching to a FA BCG and H2 buffer.

Any ideas?

Quoted:
Lets first point out that the piece on the upper receiver is called a deflector for a reason.  If the upper did not need a spent case defector, then one would have not been formed into the upper receiver to begin with.

Next, if the spent cases are hitting deflector towards the back end, then even better since everything is correct with the cycle.

Now saying this, and the fact that the military does not reload, if you want to buffer the deflector, then the fabric side of a piece of sticky back velcro is just the trick.  The will prevent the cases from being dented as the are being deflected off the deflector as to not end up in your face when shooting south paw.

On the other hand, if the spent cases are tagging the deflector at near side of the ejection port window, then chances are your bolt is retracting too far back.  To check this, just pull the charging handle all the way back, and look to see where the face of the bolt stops compared to the back of the ejection port window.  Ideally, the face of the bolt should stop about 1/4" in front of the back of ejection port window.  If the bolt retracts flush with, or behind the port window, then get back to us, and we will show you tweaks to solve that problem.

Quoted:
If brass hitting the upper is normal than why is the 3 o'clock position considered ideal extracting?  Seems to me that if the spent casings make contact with the upper than its negative extraction.

I don't really care about any damage to the deflector like some of you are suggesting. Just trying to increase extracting since that's what seems to be preached here

Quoted:


Extraction is the removal of a casing from the chamber.  Ejection is what kicks the casing out of the upper.

If the cases aren't staying in your chamber, your extraction is fine.  You don't seem to like where the brass is ejecting.

Quoted:
Dead blow effect of the buffer at the rearward stall should have the spent cases coming out of the ejection port at 4 to 5, and kissing off the defector.  This has been the norm since the first M-16 rifle, and why one of  the upgrade to the M16-A1 was to install the defector so the spent cases would not hit a south paw shooter in the face. Before the A-1 solid defector add on, there as a plastic clip on defector that south paw shooters would install on the rifle.

Running without any dead blow effect of any dead blow buffer like that of the first full auto Ar-15 that did not use a dead blow effect type device to slow the cycle down, will have the spent case ejection forward to the 2 to 3 position instead.

A spent case ejection of 3 to 4:30 straight out the ejection port window, is a rifle that the buffer is not correctly dead blow effecting at the back of the stoke to allow the spent case the time to be pivoted off in the normal direction,  a ejector with a weak spring, or extractor that is over sprung/not allowing a clean release of the spent case of the bolt face via the extractor; all of which cause the spent case to retain to the bolt face until is starts moving back forward before the spent case fully clears the bolt face.

So on that note, you can tweak the rifle in a manner to end up with spent cases more to the 3 position, but this is not the norm, and could end up with the spent case being shoved back into the front of the ejection port window instead.